New winter project (help wanted)

Alright guys, I am getting a hold of a WE 1911 soon, and its my new project for over the winter.

I plan on doing some upgrading and some modding to make this into a pretty nice pistol. From what I am told, its got some problems, but it will be a nice little challenge, and I got all fall/winter to do it.

First off, here is a link to the pistol: http://www.airsoftpost.com/product_info.php?cPath=21_45_252&products_id=27790

Here is my upgrade list at the moment: Note that I am not entirely sure what is and what is not compatible. I will be sending evike a message asking what works, but any help/advice/personnel experience from you guys would be great.

List:

http://www.airsoftpost.com/product_info.php?products_id=32277
Not to sure what all this means at the moment

http://www.airsoftpost.com/product_info.php?products_id=32759

http://www.airsoftpost.com/product_info.php?products_id=32660

http://www.airsoftpost.com/product_info.php?products_id=28513

http://www.airsoftpost.com/product_info.php?products_id=31787

http://www.airsoftpost.com/product_info.php?products_id=27267

http://www.airsoftpost.com/product_info.php?products_id=30101

Thats it at the moment. Been looking around for some other stuff. Mainly, I want to get this thing gas efficient and shooting smoothly.

Mag upgrades/mods

Apparently, some of the mags that I will be receiving have some leaking issues. Thats a given though with a we tech mag. I have seen some videos on how to make them more gas efficient, but have heard that sometimes the o rings need to be replaced.

Such as this: http://www.airsoftpost.com/product_info.php?products_id=27297

But what about this: http://www.airsoftpost.com/product_info.php?products_id=27367
Not exactly sure if I would need this or not. Would have to open up the mag to see whats up.

As you can tell, I am not a pro with gas guns. I have been researching for some time, but could use alittle guidance on the upgrade path, as well as helping me out with what some of these parts are.

Thanks